<form role="form" method="post" action="<?php echo $this->Html->url(array('action'=>'seleccionarCredito'));?>">
    <div class="form-group">
        <label for="rfc">R.F.C.</label>
        <input type="text" name="rfc" class="form-control" id="rfc" placeholder="R.F.C.">
    </div>
    <button type="submit" class="btn btn-warning">Buscar crédito</button>
</form>
